Thanks for all of the tips. I'm going to order some Jockey slip shorts (with free returns) on Amazon and see how they go. I'll definitely check out Duluth Trading Company. They are almost "local" to me!
I also found these- they miraculously popped up in my Pinterest feed....hmmmm. I have no experience with them, but just sharing for anyone that is following along.
https://www.undersummers.com